Eventually the CU was told that a single multi-faith stall would be allowed to display leaflets, though no representatives would be allowed to staff it, according to leaked emails seen by the paper. Balliol CU boycotted this option.

The decision has caused anger at Balliol, where a motion was reportedly passed unanimously accusing the JCR committee of “barring the participation of specific faith-based organisations” and describing the step as “a violation of free speech [and] a violation of religious freedom”. The motion prohibited the barring of official religious societies from future freshers’ fairs.

In an email exchange, JCR vice-president Freddy Potts, on behalf of the JCR committee, reportedly told a CU representative: “We recognise the wonderful advantages in having CU representatives at the freshers’ fair, but are concerned that there is potential for harm to freshers who are already struggling to feel welcome in Oxford.”

According to the paper, he added: “Christianity’s influence on many marginalised communities has been damaging in its methods of conversion and rules of practice, and is still used in many places as an excuse for homophobia and certain forms of neo-colonialism.”

In a Facebook post, JCR president Hubert Au said the decision to have a multi-faith stall rather than a specific CU stall, was reached “in light of both concerns raised by members [of the Welfare sub committee] and by an undergraduate survey conducted last term, which indicated a lack of familiarity as to where non-Christian societies, events and services were located”, the paper reported.

“We didn’t want to monopolise the presence of any individual faith/belief society at the Balliol freshers’ fair.”

Potts and Au made no immediate comment.

The Rev Nigel Genders, the Church of England’s chief education officer, said: “Freedom of religion and belief is a fundamental principle that underpins our country and its great institutions and universities.

“Christian Unions represent some of the largest student led organisations in many universities across the country and to exclude them in this way is to misunderstand the nature of debate and dialogue and at odds with the kind of society we are all seeking to promote.”

The University and Colleges Christian Fellowship (UCCF) said Christian Unions provide a caring, supportive community to 20,000 students across the country each year and last year, 40 unions were either nominated or awarded student union awards for their contribution to university life.

The Rev Richard Cunningham (Director of UCCF) said: “We are however concerned that the current desire to provide safe spaces on campus does not infringe on the core liberties of freedom of speech and freedom of association which are surely foundational to the university experience and indeed to basic human flourishing.”